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admin | Category: Yellow Pages Reverse Phone Lookup | 13.10.2013
3.3 As metals and other elements were discovered, scientists recognised that patterns in their physical and chemical properties could be used to organise the elements into a Periodic Table. Doing this enabled Mendeleyev to correctly predicted the properties of elements not yet discovered. Metals have good conductivity, non-metals have poor conductivity, metalloids have intermediate conductivity.
Ionisation energy: First ionisation energy is the energy required to remove one electron from the neutral atom.


From this we can say - metals have high melting points, non-metals have low boiling points. Choose a property that shows clear trends - first ionisation energy, electronegativity, and atomic radius are ideal. From this we can say - metals have high melting points, non-metals have low boiling points.A  Thata€™s because the stronger the forces between the atoms of an element, the higher the melting point. Suggest properties of some of the 4 elements you are not familiar with by using the patterns in the periods and groups.


Submit your table and graph showing how the property changes across a period and down a group.



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